... High Pressure Cylinder Co., Ltd.specializes in manufacturing Seamless Steel Gas Cylinders of B1 and B3 class under the approval ... power, Qiangli manufactures its entire products following the requirement of standards of GB5099, GB17258, EN1964, ISO9809, ISO11439 from BV France ... to both domestic and overseas market. Steel Cylinder for the On-board Storage of Compressed Natural Gas As A Fule Vehicles